/**
 * Copyright 2007 The Apache Software Foundation
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.hql;

import org.apache.hadoop.hbase.HBaseConfiguration;

public interface Command {
  /** family indicator */
  public static final String FAMILY_INDICATOR = ":";

  public enum CommandType {
    DDL, UPDATE, SELECT, INSERT, DELETE, SHELL
  }

  /**
   * Execute a command
   * 
   * @param conf Configuration
   * @return Result of command execution
   */
  public ReturnMsg execute(final HBaseConfiguration conf);

  /**
   * @return Type of this command whether DDL, SELECT, INSERT, UPDATE, DELETE,
   *         or SHELL.
   */
  public CommandType getCommandType();
}
